JPH08258433A - Package for sublimation type thermal transfer image receiving sheet - Google Patents

Abstract

PURPOSE: To prevent an acceptance layer from sticking to a package by the presence of micro-projections even when a fusion preventive agent bleeds from the acceptance layer in an atmosphere of high temperature by forming unevenness by the micro-projections on the receiving surface of a sublimation type thermal transfer image receiving sheet in the package for receiving the image receiving sheet. CONSTITUTION: In a sublimation type thermal transfer image receiving sheet 10 in which dye migrating from a thermal transfer ribbon by heating is received in an acceptance layer, the acceptance layer 12 which contains a silicone compound as a fusion preventive agent and is prepared from polyester and vinyl chloride vinyl acetate copolymer is formed on a base material 11 in which plain paper is laminated between synthetic paper sheets. Minute unevenness is formed on the receiving surface of the image receiving sheet 10 of a package 1. The package is made of a transparent plastic film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage package for an image receiving sheet used in sublimation type thermal transfer recording using a thermal head. In particular, the present invention relates to a plastic film package capable of storing the image-receiving sheet before the consumer uses it, without affecting the quality of the image-receiving sheet.

[0002]

Various bags have been put into practical use as a bag for accommodating an image receiving sheet used for sublimation type thermal transfer. For example, as described in Japanese Utility Model Application Laid-Open No. 2-117170, there is a stack of aluminum foil and polyethylene film, or a stack of aluminum foil, paper and polyolefin. In some cases, the image receiving sheet may be directly stored in these storage bodies, but between the storage body and the image receiving sheet surface of the image receiving sheet, a material substantially equivalent to the base material of the image receiving sheet is provided so as not to damage the receiving layer of the image receiving sheet. In some cases, a sheet made of is included to protect the surface of the receiving layer.

Recently, with the diversification of sublimation type thermal transfer recording, various transfer ribbons and image-receiving sheets have been developed according to applications. In particular, in the image receiving sheet, various resins, additives and the like which form the receiving layer are used. As these additives, in order to prevent the dye layer and the receiving layer of the thermal transfer ribbon from being fused by the heating of the thermal head, a fluorine compound, a silicone compound or a surfactant is used as a fusion preventing agent in the receiving layer resin. It is included. When an image-receiving sheet having a receptive layer containing such an anti-fusing agent is placed in a conventional package, and the package is further stored in a paper box or the like, when it is stored in a high temperature atmosphere, In some cases, the anti-fusing agent present on the surface of the receiving layer may be exuded abnormally to cause close contact with the film of the package. Further, when the package is placed on a desk or the like with the package removed from the paper box, and the package is loaded by a book, a camera, etc., the anti-fusing agent present on the surface of the receiving layer and the container. The resin surface of may cause adhesion. In the appearance of such adhesion, the surface of the receiving layer has a difference in glossiness and becomes a mottled pattern, which has no commercial value. Further, even if the image-receiving sheet has no apparent problem, due to the variation in the distribution of the anti-fusing agent on the surface of the receiving layer,
There is a problem in that the coefficient of static friction on the surface of the receiving layer is reduced and a conveyance failure occurs in the printer. In order to prevent such a phenomenon, it was attempted to turn the outermost image receiving sheet that comes into contact with the housing inside the received image receiving sheet upside down, but the next image receiving sheet will come into contact with the receiving layer. After all, subtle alteration of the surface of the receiving layer had occurred.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, even when an image-receiving sheet having a receptor layer containing an anti-fusing agent is weighted under a high temperature atmosphere, the glossiness and friction coefficient of the receptor layer surface are affected. The present invention was made in order to solve the problem of providing a package for a sublimation-type thermal transfer image-receiving sheet that does not affect.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a sublimation type thermal transfer image-receiving having a base material provided with a receiving layer for receiving a dye transferred from a thermal transfer ribbon by heating of a thermal head. A packaging body for accommodating a sheet, characterized in that the image receiving sheet storage surface of the packaging body is formed with an uneven shape by minute protrusions.

[0006]

In the package of the present invention, the surface of the package on the surface of the image-receiving sheet which is in contact with the resin of the receptor layer has an uneven shape due to minute projections, so that the anti-fusing agent bleeds further from the receptor layer in a high temperature atmosphere. Even if it comes out, the minute projections do not bring the receiving layer and the package into close contact with each other via the anti-fusing agent, so that the surface of the receiving layer is not deteriorated or the static friction coefficient is not lowered. Similarly, even if a load is applied, the receiving layer and the packaging body do not come into close contact with each other on the surface.

[0007]

EXAMPLES Examples of the sublimation type thermal transfer image-receiving sheet package of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an example of a sublimation type thermal transfer image-receiving sheet packaging body of the present invention. Two plastic films are provided on four sides of the packaging film.
The inner surfaces of the film are heat-sealed together to form the package 1. FIG. 2 is a cross-sectional view of an example of a sublimation type thermal transfer image receiving sheet 10 housed in a package, which is used as a fusion preventive agent on a base material 11 in which synthetic paper is vertically laminated around plain paper. Receptor layer 12 containing a silicone compound and comprising polyester and vinyl chloride vinyl acetate resin copolymer
Are formed. Generally, the receiving layer is for receiving the dye transferred from the thermal transfer ribbon by the heating of the thermal head, and is formed of a dye-dyeing resin. These dye-dyeing resins include highly polar vinyl resins such as polycarbonate resins, vinyl chloride, vinyl acetate or copolymers thereof, polyester resins, polystyrene resins, etc. in order to improve dyeing properties of dyes. Is used. Such sublimation type thermal transfer image-receiving sheets are stacked in such a manner that the receiving layer forming surfaces are in the same direction, and are stored in a package in units of 100 sheets or 200 sheets.

The material constituting the package of the present invention includes:
Examples thereof include aluminum foil, paper, plastic film and the like, and laminates thereof. As the plastic material, a transparent plastic film is used from the viewpoint of visually recognizing the image receiving sheet to be stored, but when avoiding alteration of the receiving layer by light, a colored film or a film laminated with an aluminum vapor deposition film is used. be able to. When using these films, it is preferable that the film to be the inner surface thereof does not contain additives such as a plasticizer, a dispersant and a stabilizer so as not to affect the receiving layer of the image receiving sheet. As the resin itself constituting the film, a film formed of a resin which is incompatible with the receiving layer resin is preferable in order not to promote the bleeding of the anti-fusion agent from the receiving layer when it comes into contact with the receiving layer resin. As the dye-dyeing resin, in order to improve the dye-dyeing property, a highly polar vinyl resin such as polycarbonate resin, vinyl chloride, vinyl acetate or copolymers thereof, polyester resin, polystyrene resin, etc. Olefin-based resins, which have been used and have low compatibility with these, can be preferably used. Although it depends on the method of forming the package, it is preferable to laminate a film having heat sealability.

Specific examples of the plastic film as a material for the package include ordinary cellophane, moisture-proof cellophane, cellophane coated with polyvinyl chloride or polyvinylidene chloride, acetate, low density polyethylene, linear low density polyethylene, high Density polyethylene, stretched polypropylene, unstretched polypropylene, vinylidene chloride-coated stretched polypropylene, polyvinyl chloride, polyvinylidene chloride, polyester, vinylidene chloride-coated polyester, general-purpose polystyrene, stretched polystyrene, high-impact polystyrene, expanded polystyrene, nylon, Stretched nylon, unstretched nylon, vinylidene chloride coated nylon, vinylidene chloride coated unstretched nylon, polyvinyl alcohol, polycarbonate, eval, ethylene vinyl acetate copolymer Saponified, non-saponified), aluminum vacuum deposition film or the like can be used. In particular, a biaxially stretched polypropylene and unstretched polypropylene laminate film or co-extruded film has a heat-sealing property in the unstretched polypropylene as the storage surface, and since the film itself contains few additives, it has little effect on the receiving layer. Also, biaxially oriented polypropylene has tearability and can be used satisfactorily. As this laminated film, a transparent material is used in that the stored image receiving sheet is visually recognized in the inspection step, but the design surface may be colored or patterned by printing or the like. The thickness of these films is
If it is 10 μm to 100 μm, there is no problem in strength.

A feature of the present invention is that the storage surface of the package is made into a minute uneven shape. As a result, even if the anti-fusing agent is abnormally bleeding from the receptor layer of the image receiving sheet when placed in a high temperature atmosphere of 60 ° C., the receptor layer and the film of the package adhere to each other through the anti-fusing agent. Can be prevented.
Further, even if a load is applied, it is possible to prevent the receiving layer and the film from sticking to each other on the surface due to the minute unevenness.

The film on which fine irregularities are formed can be formed by various methods. For example, by mixing inorganic or organic particles in the film, a method of forming minute unevenness on the surface, or by forming a film and forming an uneven shape by applying minute protrusions by heating and pressing the embossing plate There are things to do.

The shape of the unevenness due to the small protrusions is according to JIS B
0601-1982, the center average roughness is 0.3 to 3.0, the ten-point average roughness is 5 to 15, and the smoothness (Oken type smoothness meter) has physical properties of 5000 sec or less. It can be preferably used. When the center average roughness is 0.3 or less, when the heat fusion inhibitor is exuded from the receiving layer of the receiving sheet in a large amount, when a large load is applied to the package, or when the storage condition is bad, For example, when the film is stored at a high temperature for a long time, the receptive layer and the film may adhere to each other to cause a problem.

The package may have any shape as long as it can store the image receiving sheet. As shown in FIG. 1 as an example, there are two films that are heat-sealed by their inner surfaces, or one film that is heat-sealed on three sides by folding. Further, as shown in FIG. 1, the notch 2 for opening may be formed, or a magic fastener 4 may be provided below the heat seal portion 3 on the side to be the opening to improve the sealing property after opening. Can be improved.

The package containing the image-receiving sheet is placed in a paper box and stored until it reaches the consumer. The paper box also contains a thermal transfer ribbon used together with the image-receiving sheet. This thermal transfer ribbon is formed by forming a dye layer containing a sublimable dye in a resin binder on a plastic film substrate such as polyester. The package that houses such a thermal transfer ribbon is not particularly specified, and the package of the present invention can be used. In addition, when the package of the image receiving sheet and the package of the thermal transfer ribbon are made of a transparent film, it is possible to prevent the product from being mixed when the package is stored in the paper box.

Specific examples and comparative examples will be shown below. Example 1 A non-stretched polypropylene of a laminated film of 20 μ biaxially stretched polypropylene and a 40 μ unstretched polypropylene (embossed inner bag: Okura Industry Co., Ltd.) was used as a heat-sealing surface and a storage surface. This unstretched polypropylene surface has a center average roughness of 0.
The film was 8 to 1.4, the ten-point average roughness was 7.0 to 13.0, and the smoothness was 2000 to 3000 sec. An image-receiving sheet containing a catalyst-curable silicone cured product as a heat-sealing-preventing agent was placed in this, and four sides were sealed to obtain a package of the present invention. This package is placed in an atmosphere of 60 ° C for 4
After storing for 8 hours, the surface of the image receiving sheet was observed, but no change in gloss was observed. Further, the coefficient of static friction between the surface of the thermal transfer ribbon and the surface of the receiving layer is 0.40 to 0.
The range was 46, and the printer could be conveyed well. (The coefficient of friction before storage is 0.43 to 0.50 for the three color dye layers.
Met. )

Example 2 30 μm biaxially oriented polypropylene film and 40 μm
The non-stretched polypropylene of m (non-stretched polypropylene film) laminated film (mat inner bag: manufactured by Daido Co., Ltd.) was used as the heat-sealing surface and the storage surface. The unstretched polypropylene surface has a center average roughness of 2.0 to 2.4,
Ten-point average roughness 6.5-11.5, smoothness 3000-
It was a film of 4000 sec. An image-receiving sheet containing a catalyst-curable silicone cured product as a heat-sealing-preventing agent was placed in this, and four sides were sealed to obtain a package of the present invention. After storing this package for 48 hours in an atmosphere of 60 ° C., the surface of the image receiving sheet was observed, but no change in gloss was observed. Further, the coefficient of static friction between the surface of the thermal transfer ribbon and the surface of the receiving layer was in the range of 0.30 to 0.37 for the dye layers of three colors, and the printer could be satisfactorily conveyed. (The coefficient of friction before storage was 0.43 to 0.50 for the three color dye layers.)

Example 3 A laminated film of 30 μm biaxially stretched polypropylene and 40 μm unstretched polypropylene (transparent inner bag:
Unstretched polypropylene manufactured by Daido Co., Ltd. was used as the heat-sealing surface and the storage surface. This unstretched polypropylene surface had a center average roughness of 0.1 to 0.3, a ten-point average roughness of 1.0 to 2.0, and a smoothness of 100,000 or more. An image-receiving sheet containing a catalyst-curable silicone cured product as a heat-sealing-preventing agent was placed in this, and four sides were sealed to obtain a package of the present invention. After storing this package for 24 hours in an atmosphere of 60 ° C., the surface of the image receiving sheet was observed, but no change in gloss was observed. The coefficient of static friction between the surface of the thermal transfer ribbon and the surface of the receiving layer is 0.32 for the dye layers of three colors.
The range was up to 0.38, and the printer could be conveyed well. (The coefficient of friction before storage is 0.43 ~ for dye layers of three colors.
It was 0.50. In addition, when the image-receiving sheet was observed after the package was stored in an atmosphere of 60 ° C. for 48 hours, a mottled gloss unevenness was found on the surface.

Comparative Example 1 The same packaging material as in Example 3 was used, and an image-receiving sheet containing a catalyst-curable silicone cured product as a heat-sealing-preventing agent was placed therein, and the four sides were sealed to form a book. An inventive package was obtained. After storing this package for 48 hours in an atmosphere of 60 ° C., the surface of the image-receiving sheet was observed, but there was spotty uneven gloss, and the coefficient of static friction between the thermal transfer ribbon and the surface of the receiving layer was 3 dye layers. , 0.2 to 0.28, and slip occurred during the transportation of the printer. (The coefficient of friction before storage is 3
The color dye layer was 0.43 to 0.50. ) Examples 1 to 3 and Comparative Example 1 are summarized in Table 1.
Regarding the runnability, when the number of samples was 10, the one in which the running failure did not occur in the printer was ◯, and the one in which the running failure occurred even once was marked as x.

[0019]

[Table 1]

[0020]

According to the package of the present invention, the image receiving sheet having the receiving layer containing the anti-fusing agent is stored,
Even if stored, the quality of the receiving sheet does not deteriorate. Further, even if a load is applied in a state of being taken out from the paper box, the quality of the receiving sheet does not deteriorate due to contact with the plastic film of the packaging body.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a package of the present invention.

FIG. 2 is a cross-sectional view showing an example of a sublimation type thermal transfer image receiving sheet housed in a package.

[Explanation of symbols]

 1-Package 2-Notch 3-Heat seal part 4-Magic fastener 10-Sublimation type thermal transfer image-receiving sheet 11-Base material 12-Receptor layer

Claims (4)

[Claims] 1. A package for accommodating a sublimation-type thermal transfer image-receiving sheet, which comprises a substrate having a receiving layer for receiving a dye transferred from a thermal transfer ribbon when heated by a thermal head. A sublimation-type thermal transfer image-receiving sheet packaging body, characterized in that an uneven shape is formed by minute protrusions on the sheet storage surface. 2. The center line average roughness of the uneven shape (JIS
B 0601-1982) is 0.3 to 3.0, The sublimation type thermal transfer image-receiving sheet package according to claim 1. 3. The sublimation-type thermal transfer image-receiving sheet packaging body according to claim 1, wherein the packaging body is formed of a plastic film. 4. The sublimation-type thermal transfer image-receiving sheet package according to claim 3, wherein the plastic film is transparent.